| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this [vb mod] [adv] have [verb] | 76 |
|
| 2 | [adj] [vb mod] [adv] have happen | 32 |
|
| 3 | this [modal v] [adv] have happen | 21 |
|
| 4 | this [vb mod] [adv] [verb] happen | 21 |
|
